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+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc. All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef GOOGLE_PROTOBUF_IMPLICIT_WEAK_MESSAGE_H__
+#define GOOGLE_PROTOBUF_IMPLICIT_WEAK_MESSAGE_H__
+
+#include <string>
+
+#include <io/coded_stream.h>
+#include <arena.h>
+#include <message_lite.h>
+#include <repeated_field.h>
+
+#ifdef SWIG
+#error "You cannot SWIG proto headers"
+#endif
+
+#include <port_def.inc>
+
+// This file is logically internal-only and should only be used by protobuf
+// generated code.
+
+namespace google {
+namespace protobuf {
+namespace internal {
+
+// An implementation of MessageLite that treats all data as unknown. This type
+// acts as a placeholder for an implicit weak field in the case where the true
+// message type does not get linked into the binary.
+class PROTOBUF_EXPORT ImplicitWeakMessage : public MessageLite {
+ public:
+ ImplicitWeakMessage() {}
+ explicit ImplicitWeakMessage(Arena* arena) : MessageLite(arena) {}
+
+ static const ImplicitWeakMessage* default_instance();
+
+ std::string GetTypeName() const override { return ""; }
+
+ MessageLite* New(Arena* arena) const override {
+ return Arena::CreateMessage<ImplicitWeakMessage>(arena);
+ }
+
+ void Clear() override { data_.clear(); }
+
+ bool IsInitialized() const override { return true; }
+
+ void CheckTypeAndMergeFrom(const MessageLite& other) override {
+ data_.append(static_cast<const ImplicitWeakMessage&>(other).data_);
+ }
+
+ const char* _InternalParse(const char* ptr, ParseContext* ctx) final;
+
+ size_t ByteSizeLong() const override { return data_.size(); }
+
+ uint8_t* _InternalSerialize(uint8_t* target,
+ io::EpsCopyOutputStream* stream) const final {
+ return stream->WriteRaw(data_.data(), static_cast<int>(data_.size()),
+ target);
+ }
+
+ int GetCachedSize() const override { return static_cast<int>(data_.size()); }
+
+ typedef void InternalArenaConstructable_;
+
+ private:
+ std::string data_;
+ GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(ImplicitWeakMessage);
+};
+
+// A type handler for use with implicit weak repeated message fields.
+template <typename ImplicitWeakType>
+class ImplicitWeakTypeHandler {
+ public:
+ typedef MessageLite Type;
+ static constexpr bool Moveable = false;
+
+ static inline MessageLite* NewFromPrototype(const MessageLite* prototype,
+ Arena* arena = nullptr) {
+ return prototype->New(arena);
+ }
+
+ static inline void Delete(MessageLite* value, Arena* arena) {
+ if (arena == nullptr) {
+ delete value;
+ }
+ }
+ static inline Arena* GetArena(MessageLite* value) {
+ return value->GetArena();
+ }
+ static inline void Clear(MessageLite* value) { value->Clear(); }
+ static void Merge(const MessageLite& from, MessageLite* to) {
+ to->CheckTypeAndMergeFrom(from);
+ }
+};
+
+} // namespace internal
+
+template <typename T>
+struct WeakRepeatedPtrField {
+ using TypeHandler = internal::ImplicitWeakTypeHandler<T>;
+ constexpr WeakRepeatedPtrField() : weak() {}
+ explicit WeakRepeatedPtrField(Arena* arena) : weak(arena) {}
+ ~WeakRepeatedPtrField() { weak.template Destroy<TypeHandler>(); }
+
+ typedef internal::RepeatedPtrIterator<MessageLite> iterator;
+ typedef internal::RepeatedPtrIterator<const MessageLite> const_iterator;
+ typedef internal::RepeatedPtrOverPtrsIterator<MessageLite*, void*>
+ pointer_iterator;
+ typedef internal::RepeatedPtrOverPtrsIterator<const MessageLite* const,
+ const void* const>
+ const_pointer_iterator;
+
+ iterator begin() { return iterator(base().raw_data()); }
+ const_iterator begin() const { return iterator(base().raw_data()); }
+ const_iterator cbegin() const { return begin(); }
+ iterator end() { return begin() + base().size(); }
+ const_iterator end() const { return begin() + base().size(); }
+ const_iterator cend() const { return end(); }
+ pointer_iterator pointer_begin() {
+ return pointer_iterator(base().raw_mutable_data());
+ }
+ const_pointer_iterator pointer_begin() const {
+ return const_pointer_iterator(base().raw_mutable_data());
+ }
+ pointer_iterator pointer_end() {
+ return pointer_iterator(base().raw_mutable_data() + base().size());
+ }
+ const_pointer_iterator pointer_end() const {
+ return const_pointer_iterator(base().raw_mutable_data() + base().size());
+ }
+
+ MessageLite* AddWeak(const MessageLite* prototype) {
+ return base().AddWeak(prototype);
+ }
+ T* Add() { return weak.Add(); }
+ void Clear() { base().template Clear<TypeHandler>(); }
+ void MergeFrom(const WeakRepeatedPtrField& other) {
+ base().template MergeFrom<TypeHandler>(other.base());
+ }
+ void InternalSwap(WeakRepeatedPtrField* other) {
+ base().InternalSwap(&other->base());
+ }
+
+ const internal::RepeatedPtrFieldBase& base() const { return weak; }
+ internal::RepeatedPtrFieldBase& base() { return weak; }
+ // Union disables running the destructor. Which would create a strong link.
+ // Instead we explicitly destroy the underlying base through the virtual
+ // destructor.
+ union {
+ RepeatedPtrField<T> weak;
+ };
+};
+
+} // namespace protobuf
+} // namespace google
+
+#include <port_undef.inc>
+
+#endif // GOOGLE_PROTOBUF_IMPLICIT_WEAK_MESSAGE_H__